Enhanced performance of a Na 3.5 Co 4 [Bi 2 Co 2 W 19.75 O 70 (H 2 O) 6 ]/porous graphitic carbon nitride heterojunction based photocatalyst realized by the addition of copper sulfide nanoparticles

Photocatalytic hydrogen (H 2 ) evolution can effectively solve the global energy problem, in which the key factor is the synthesis of efficient photocatalytic materials.